`melgeek/mojo68/rev1`: reduce firmware size (#24171)

keyboards/melgeek/mojo68/rev1/keyboard.json

@@ -45,8 +45,6 @@
             "hue_breathing": true,
             "hue_pendulum": true,
             "hue_wave": true,
-            "typing_heatmap": true,
-            "digital_rain": true,
             "solid_reactive_simple": true,
             "solid_reactive": true,
             "solid_reactive_wide": true,